Self-restoring clear-out drop for telephone-switchboards.



0. D. ENOOHS. v SELF RESTORING CLEAR-OUT DROP EOE TELEPHONE SWITGHBOARDS.

APPLICATION FILED APR. 30. 1906. I 921 ,384;. Patented May 11, 1909.

2 SHEETS-SHEET '2.

1k c tui 2% f CQd6llkacks UNITED sirar nsra rsnr orrron CLAUDE D. ENOCHS, .OF LACROSSE, WISCONSIN, ASSIGNOR TO THE VOTE-BERGER CO., A

' CORPORATION OF WISCONSIN.

snnr-mzs'ronme cLnAn-ournnoP ron 'rnrnrnonn-swrronnoanns.

No. 921,384. g

' Applicatlonfiled s ur so, @906. Serial No. 31 ,461.

Specification of Letters Patezit.

Patented May 1 1, 1909. a

To all whom it may concern/ a Be it known that I, CLAUDE D. Eno'ona a, cltlzen of the United States, residing atLa Crosse, in the county of La Crosse and'State' provide improved means for automatically restoring the drop shutter, simplicity'ofcon struction and effectiveness in use.. g

In the accompanying drawings forming part of this specificatiom'Figure 1 is a side elevation, partly in section, of my invention; Fig. i 2 is a view looking at the bottom of the keyboard and showing the cord partly broken and cord partly broken away, and Fig. 4'is a detail side elevation.

keyboard,on which is suitably mounted an 25 electromagnet B, head block C of a drop and self-restoring mechanism D for the shutter on the drop. As shown, the magnet is provided with an armature 2, which is pivotally carried by a yoke 3, which in-turn is removably fastened to'the shell 4 of the magnet by means of spring catches 5. The armature carries a latch 6, which extends forward over the magnet shell to normally hold the shutter 9 closed. The purpose of detachably su porting the yoke on the shell is to provi e means whereby the armature may be detachedand the coil within the shell removed when desired. I

The shutter 9 is ivoted in the usual manner, as at 8, upon t e front of the head block and is provided with an indent 7 on its inner face for the retention of the' shutter in position by means of thelatch This construction causes the shutter to normally cover the end of the latch 6 from view-in front The shutter is provided with an inturned tongue 10, which lprojects into the chamber 11 in the headbloc f I The self-restoring mechanism includesa plug seat. 12 formed by a bracket which is suitably fastened tothe keyboard and by a socket 13 passing vertica ly through said keyboard. Passing across said brac et is a lever 14, one end of which is pivoted at 15 by l 55 a suitable support upon the keyboard and away; Fig. 3 is a front view showing the plug Vwhich said cord loosely the other end looselyconnected at 16 to a trigger arm 17,=which loosely engages the tongue on the shutter and passes through -an opening 18 in the keyboard. At the back of the head block C is a plate 19, which is provided with a loop 20.- A tractile spring 21 has its ends connected one to the loop and theother to the trigger end of the lever 14. The lever 14 and plug seat 12 have openings 22 -through which the connecting cord 23 plays freely, the opening through the lever being of, sufficient size to prevent the.

cord touching it when twisted or bent about i the keyboard. One end of the cord is connected with the usual plug 24 and its other end with theswitchboard mechanism in the customarymanneri Between the ends of the cord a Weighted pulley 25 is freely dis- 7 I spring 21 raises the lever 14 with its trigger In the drawlngs A represents a portion of :a a

ove the tongue 10. When the shutter drops the plug is returned to its seat, the pulley'25 carrying it into its seat and depressing the lever 14. This o eration lowers the trigger and automatica y restores the shutter into engagement with the latch 6. i

Tt is obvious that the construction above set forth may bechanged and varied without departing from the spirit of this invention, and I do not-limit or confine myself to the exact construction described.

7 Having described my invention, what I claim as new and desire to protect by Letters Patent, is

1-. A'drop including a head block, a shut+ ter pivotally supported on said block, havin an in-turned tongue, a key board, aweighte cord and plug passing through said board, a lever 'actuated downwardly by the weight of said plug, and having an opening through lays, means for. moving said lever upwardl a seat below said lever having an opening through which said cord passes, and a trigger carried by said lever and adapted to engage said tongue to restore said shutter.

2. A drop including a head block, a shutter pivotally supported by said block, having frame, alever pivoted upon said frame, actu l ed cord and plug, and a suitable frame for s ated by the weight of said plug and having supporting said arts, said frame, lever and an opening through which said cord loosely seat provided wit 1 an opening through which plays, and a seat on said frame below said i said cordis free to play, said plug adapted ever having an opening through which said E normally to rest upon said lever to cause cord passes. i said trigger to restore said shutter. 93

'3. Adevice of the class set forth, compris- I I In testimony whereof I have signed my ing a drop having a pivoted shutter provided name to this specification in the presence of with an inturned tongue, a head block suit- I two subscribing witnesses.

ably chambered to receive said tongue, a 1 a trigger ro jecting into said head block and CLAUDE OM15 adapted to engage said tongue for restoring WVitnesses:

said shutter, an up-pressed lever carrying P. J. RIEGGER,

said trigger, a seat below said lever, a Weigh WM. A. GRIMEs. 

